News At Seven-Thirty highlights: Police offers rewards of 900,000 dollars for information of the person responsible for acid attacks; 4 more imported cases of H1N1 was confirmed; Gordon Brown appears to have fended off a potential leadership challenge; 3 days to go before Iran presidential elections; families of jailed journalists ask North Korea to release them; racial tension is increasing in Sydney after an attack on 2 Indian students; taxi drivers were sentenced for blocking the road in a protest; Government hopes schools will volunteer for drug testing for students; anti-smoking advocates strong disagree extending the exemption period; Taiwan will relax restriction for mainland visitors.